“I have no doubt that they can tell the difference between someone who ets MREs and someone who consumes a traditional Middle Eastern diet.”
That sounds plausible, but it may not work. Just last night I saw a program of the “History Detectives” on PBS. They investigated a top secret experiment conducted by our military in 1942 shortly after the attack on Pearl Harbor. They tried to train dogs to locate Japanese soldiers in the jungle by scent alone. The project was canceled after a trial that failed, and modern military dog trainers said the dogs cannot differentiate between races based on scent alone.
I am not talking abot races. I am talking about diet, which may (or may not) be race related.